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The third is most difficult to address, he says, based on "the naturalistic fallacy", where people reason that natural things are good and unnatural things are bad.

But while you can argue that evolution has aligned us with certain conceptions of family, it’s a naturalistic fallacy to say that they’re necessarily better for us.

That puts my dad ahead of Stephanie Messenger and the other abusive parents who are willing to let their children risk death — and have other, vulnerable people risk infection — because they have been taken with the naturalistic fallacy.

That’s the naturalistic fallacy—the claim that because something is a certain way in nature, it ought to be that way all the time.

Last month, Mark Davis and colleagues argued in Nature that experts and laypeople are committing a naturalistic fallacy when it comes to favoring native species over nonnative or invasive species.